Worth



(No Mo de1.)

' G. R. GULLINGWORTH'.

REGULATOR FOR AIR GOMPRBSSORS. No. 377,481. Patented Pebr'i, 1888.

E NITED STATES GEORGE a. GULLINGWORTH, O NEW YORK, N. Y.

REGULATOR FO'R AIR-'COMPRESSORS. f

SPECIFICATION forming part of Letters Patent No. 377,481, dated Pebrnary 7, 1888.

Application filed May 18, 1887.

To a. whom it may concern.-

Be it known that I, GEORGE R. CULLINGv WORTH, of the city and county of New York,

' and State of New York, have invented a new and useful Improvement in Regulators for Air-Compressors, of which the following is a specification. g

In connection with air-compressors em-- ployed to supply and maintain a volume of compressed air in a receiver or tank for use in operating a number of rock-drills or other machines it is common to employ a regulator which comprises a motor-pistonloaded to any desired extent, and which isvacted upon by compressed air from the receiver, so that when the air within the receiver exceeds the press, ure which it isdesired to maintainthe motorpiston comprised in'the regulator will. be

moved or lifted.

In my UnitedjStates Letters Patent 'No. 287,104, datcdOetober 23, 1883, I have shown a system of mechanical connections whereby the motor-piston of the regulatoiywhen moved by an excessive pressure of air, acts to partially close a valve through which the engine driving the compressor is supplied with steam,

so that when the pressure within the receiver exceedsthat desired the supply-valve of the engine will be more or less closed to stop it entirely or reduce its speed. F

The object of my invention is to provide means whereby this closing of thesupplyvalve of the engine, which I term the throttle-valve, shall be effected by the pressure of air; and to this end I combine with such supply or throttle valve a piston, and I also provide, in connection with the regulator motor-piston,avalve operatedthereby,andwhich, wheuthe motor-piston is raised or moved by an excessive air-pressure, is opened to admit air to the motor-piston of the supply-valve in order to close said supply-valve.

In the accompanying drawings, Figure 1 represents an elevation of such parts of an aircompressor as are necessary to illustrate my invention, a regulator with its valve and a valve for controlling the supply of steam to a of the dotted line 01x, Fig. 1, transverse to the axis of the compressor-cylinder; and Fig. etis a vertical section of the regulatonmotor upon a larger scale than Fig. 1. V

Similar letters of reference designate'corresponding parts in all the'fignres.

A designates a portion of the compression-f 1 B, (hereshown asbalanced) and it is obvious I that when this valve B is "opened there ,is free communication between the oppositeends of the compressorcylinder, and the pressurein advance of the main com pressing-piston is relieved by the air being passedthrough the passageB from one end to the other of thecyl- Connected with the stem ot'the valve inder. Bisa motor-piston,0,which is fittedwithin a .cylinder, 0,and tothis cylinder, below thepiston, air-pressureis supplied through apipe, o, and a port or passage, 0, from the receiver for compressed air, into which air is pumped by the operation of the main compressor. The motor-piston O is loaded to hold the;valve B. to its seat, and in this example of the invention this loading is accomplished by weights d, suspended by a rod,d, from a lever, d",which is fulcrumed at d,and exerts pressure through a plunger or bar, (1 upon the motorpiston O. D designates a valve shell or casing, which is to be placedin thelineof steam-pipe leading to theengine which operates the compressor,

and in this shell or casing isa'valve, D,

(here shown as balanced.) To the stem ofthis L valve D is connected asmaltmotor-piston,

D operating within a suitable cylinder, D3,

and a pipe, D*, connects this cylinder D with I As here represented, a per the regulator. tion, a", of the valve-stem, which connects the motor-piston O with the valve B, is made tubular and fitted to a tubular bore, 0 extending stem a constitutesv avalve for controlling the flow of air under pressure from the pipe (3. to

Within the'cylindric' .93 from themotor-cylinder c, and this tubular;

, bore 0 which receives the valve'chi have represented a belt, 0, which communicates by a port or passage, a with the pipe D, andin the wall of the tubular stem 0 I have represented openings 0 c c. \Vhen the valve D is opened, as shown in Fig. 1, and the pressure within the receiver is not excessive,the motor-piston O, by reason of the weight with which it is loaded, remains in its lowest position, closing and holding the valve B closed. In this position of parts the portor passage 0 is exposed below the valve-casing a, and the port or passage c in the hollow stem 0 is opposite the port or passage 0 Consequently the cylinder D has a free air-vent through the pipeD, the passage 0 the hollow stem 0', and the opening a, and the valve D is fully opened.

When the pressure within the receiver for compressed air exceeds that desired, the compressed air passing through the pipe 0 and the passage 0 to the cylinder 0 lifts the motor-v piston 0, thereby opening the valve B, and places opposite ends of the compressor-cylinder A in free communication throughthe passage B. By this movementof the motor-piston O the opening a is raised above the valve-casing 0" and is exposed in the cylinder 0, and at the same time the opening a is sheathed within the valve-casing 0 this being the position of parts shown in Fig. 2. The compressed air may therefore pass through the cylinder 0, through the opening 0 to the hollow stem 0', and thence through the opening 0 and the port a", and through the pipe D to the cylinder D. In the cylinder D the compressed air acts upon the piston D and serves to close the valve D, thereby diminishing or cutting 05 the supply of steam to the operating-engine for the time being. As soon as the pressure of air within the receiver falls to or below the normal pressure, the motor-piston O, by'reason of its load, descends, closing the valve B and placing the parts in the position shown in Figs. 1 and 4, thus permitting the valve D to open and the operating-engine to resume its work.

The ports and passages above described will be more easilylocated and'their function more readily understood from Fig. 4, in which the position of parts corresponds with Fig. 1, but which is upon a larger scale.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, with a valve for con.- trolling the supply of steam for operating an air-compressor and an actuating-piston connected with said valve for closing it, of a valve for relieving the pressure before the main compressor-piston, a motor-piston connected with the relief-valve and arranged to be acted on by compressed air, and a valve operated by the motor-piston and serving when opened to admit compressed air to act upon the actuating-piston of the supply-valve for closing said supply-valve, substantially as herein described. v

2. The combination, with a valve for controlling the supply of steam for operating an air-compressor and an actuating-piston connected with said valve for closing it, of a valve I for relieving thep ressure before the main compressorpistomand a motor-piston connected with said reliefivalve and arranged to be acted on by compressed air, and having a hollow rod which serves as a Valve for admitting air to act upon the actuating-piston of the supplyvalve for closing said valve, substantially as herein described.

3. The combination, with the steam supply valve D and its actuating piston and cylinder D D of the passage B, for connecting the ends of a compressor-cylinder, the relief-valve B in said passage, the motor-piston and its hollow rod 0 a, connected with the relief-valve B and having the passages c c, and the cylinder and cylinder-extension O a for said motor piston and rod, and having the passages c a and the pipes c D, for supplying compressed air to the motor-cylinder O and for conducting compressed air from the passage 0 to the actuating-cylinder D" of the valve D, substantially as herein described.

G. R. GULLINGWORTH.

\Vitnesses:

FREDK. HAYNES, G. E. SUNDGREN. 

